I have a 2-year old Hitachi Progressive-Scan DVD player with problems. Some discs (it seems to be worse with dirty or scratched ones) it won't play at all- it can't find the disc. Others, it starts getting jerky or freezing up partway through. I thought it might just be dirt on the lens, but I tried cleaning it and the problem persists. Any thoughts?
BTW, my electronics proficiency is modest, so if this is something difficult to fix, I'm probably chucking the unit.